Steam locomotive



J. H. STANNAHD, Sn. STEAM LOCOMOTIVE.

APPLICATION FILED JULY 10. 1920.

1,437,478- Patented De0.5,1922.

3 SHEETS-SHEET l.

J'HflZannard, Z wa lad a f attorney Wnwsss a J. H. STANNARD, S'R. STEAM. LOCOMOTIVE.

APPLICATION FILED JULY I0, I920.

1,437,478 Patented Dec. 5, 1922 3 SHEETSSHEET 2.

L I. STANNARD, sII.

STEAM LoqoIvIoTIvE. APPLICATION FILED JULY I0. I920.

BEETS-SHEET 3.

Patented Dec. 5, 1922.

QwQ Q I Patented Deco 1222.

than

d'fiSEPH H. STANNARD, SR., 0% COLUMBIA, SOUTH CAROLINA.

STEAM LOGOMOTIVE.

application filed July 10,, 1920.. Serial No. 395,198.

To all whom'z't may comer '71.

Be it known that I, Josnrn H. STANNARD, Sn, a citizen of the United States, residing at Columbia, in the county of Richland and State of South Carolina, have invented new and useful Improvements in Steam Locomotives, of which the following is a specification.

The present invention relates to improvements in steam locomotives and particularly to locomotives of that type employing superheaters.

With locomotives of this type it is of great importance that the flow of gases through the dues into which the tubes of the superheater extend be cut off when steam is not circulating through said tubes. One of the objects of the present invention is to provide a simple means by which the damper controlling the flow of gases through the superheater flues will be automatically controlled in unison with movement of the main throttle of the locomotive. More particularly, the invention provides means of this character in which the parts that are likely to become worn or need replacement are all locgied outside of the locomotive where they ill be readily accessible. That is, the invention provides means which may, if necessary, be readily repaired or replaced so that a minimum amount of time is required for such work.

A further object of the invention is to provide a simple means for supplying a relatively small amount of steam to the steam chests of the locomotive when the main throttle is closed, or practically closed, and the locomotive is-drifting. The advantages of such a device are well known and this feature of the invention relates primaril to providing a simple control means whic is so connected with the superheater damper devices that both the drifting steam supply and the damper referred to, will be directly controlled by. thethrottleactuating rod or member which is'moved by the engineem.

In the accompanying drawings Figure 1 is an elevation of a portion of a locomotive having an embodiment of the present invention applied thereto; Figure 2 is a detail view substantially on theline 2.2 of Figure 1;

Figure 3 is a vertical section through the front end of the locomotive, on an enlarged scale;

-,the damper in substantially 1 tion with its forward edge :Of the front of the baflle 17 Figure 4 is a sectional view substantially on the line 4-4 of Figure 3, several of the parts being omitted;

w 1*" gure 5 is a longitudinal section through the yalve controlling the flue damper; Figure 6 is a similar section of the driftmg valve.

Referring to the drawings, 10 designates the front flue sheet of'the boiler through which open the fire tubes ll'and the superheater flues .12. As usual the latter are shown arranged in the upper portion of the boiler and the superheater tubes 13 projecting therefrom are connected with a suitable header 14 from which the steam is conducted to the valve chests of the locomotive cylinders in the ordinary manner.

As the invention hereinafter described and claimed is adapted for usewith locomotive boilers of various types, it is not thought necessary to describe or illustrate more in detail many of the features" of such an apparatus. 1

Within the front end of the locomotive,

about the usual exhaust nozzle 15 therein, is arranged a flat table 16 and from-the rear end of this table a baflle 17 extends to the top sheet of the smoke box. The table 165s situated in'a horizontal plane slightly below the lowest superheater flue 12 and the bottom of the space formed between the forward flue sheet and said baffle 17 is closed by means including a vertically swinging damper 18. This damper is hinged at its rear endto a plate 19 that extends forward from the flue sheet 10 and a weighted arm 20 acts to hold ri-zontal posisililghtly in rear cans are provided whereby when the throttle of the locomotive is open and steam is circulating through the superheater tubes 13 the damper 18 will be swung downward and rearward so that the gases and products of combustion can circulate freely through the superheater flues 12. Such means include a pressure cylinder 21 which is provided with a steam supply pipe 22 that extends outside the side wall of the locomotive shell or casing rearwardly and upwardly to a valve casing 23 supported on the top'of the locomotive and which will be hereinafter more particularly referred to. A rock shaft 24 journaled in suitable bearings connected with the cylinder 21 is adapted to be rocked in one direction when steam is admitted to said cylinder through the pipe 22 and in the opposite direction by the weighted lever when the to and from a position where they will extend over and close said perforations As shown, each of said plates is pivotally. connected at its ends to uprights 31 secured to the baffle .17 and at its opposite edge each of said plates is pivotally connected to a link 32, the lower end of which is connected by a short link 33 to an arm 34 on the inner end of the rock shaft 30.

From the foregoing description and the drawings, it will be seen that when steam is admitted to the cylinder 21 the damper 18 will be rocked downward and rearward and the plates '35 in advance of the baflle 17 swungl upwardly about their pivotal axes intot e positions shown in Figure 3 whereby there will be, free an unobstructive draft through the superheater flues 12. When, however, the main throttle of the locomotive is closed so that steam no longer circulates through the superheater tubes, the weighted arm- 20 will act to swing the damper 18 up;

ward, closing the passage between the forward flue sheet and the bafiie 17 and the A swinging plates 35 in front of the bafile will be moved so as to completely close the perforations in suchplate.

The supply of steam to the pressure cylinder 21 through the conduit 22 is controlled by a three-way valve mounted in the casing 23. .Steam from a suitable chamber within the boiler is admitted to the valve casing 23 s through a pipe 40 and. said casing communicates with the pipe or conduit 22 and also 'withan exhaust pipe 41.- The valve inthe casing 23 is provided at its end with an arm 42 which is connected through a link 43 with a lever 44 fulcrumed on the locomotive. At its lower end this lever 44 has a notch which engages a lug. or lateral projection on the reciprocating rod 45 which is moved by the engineer for opening and closing the main throttle of the locomotive. Therefore, when the rod 45 is moved to open the locomotive throttle, the valve in the casing 23 will be turned to establish communication between the conduit or pipe 22 and the inlet pipe 40. Thus steam will be supplied to the pressure cylinder 21 and the damper 18 will be opened and the perforations in the bai'ie 17 uncovcred-so that the maximum amount of draft through the superheater times will be pere mitted. When; however, the rod 45 is shifted to closethe throttle the valve in casing 23 will be turned so that the pipe or conduit 22 through;

it will be seen that with such a construction and arrangement, it is, impossible for any steam, that might leak past the throttle or the valve in the casing 23 to create such a pressure in the cylinder 21 as to open the damper when the locomotive is standing still, for example. In means generally similar to those herein-described that have been heretofore proposed, it has frequently-occurred that when'the main throttle was presumably closed, steam would gain access to the cylinder 21 and after a sufficient interval of time effect anopening of the damper which would permit flow of combustible gases through the superheater fiues when no steam was circulating in the superheater and, therefore, cause injury to the superheater tubes.

The invention also includes means whereby whcn the main throttle has been closed, and the locomotive is drifting, a relatively small amount of steam will be supplied to the valve chests of the locomotive cylinders so that the action of the pistons will not operate to draw into such cylinders particles from the front end of the locomotive. As shown, this means includes a pipe or conduit 50, which leads from a valve casing 51,

that is mounted on the same support as the valve casing 23 on top of the locomotive, said pipe having a branch leading to each of the steam chests 52. A non-return valve 53 is provided in each branch of the pipe 50 and steam is supp-lied to the casing 51 through a supply pipe 54 corresponding to the pipe 40 of the valve casing 23. The valves in the casings 23 and 51 are connected by a coupling sleeve 55, so that move ment of the throttle actuating rod 45 will be communicated to the valves in both said casings; The valve in the casing 51 is a two-way valve controlling merely an inlet and outlet port. .When these ports'are connected steam is supplied through the pipe 50 to the velve chests'52 in suflicient quantity to prevent grit and products of comhustion being drawn back from the stack onto the valve seat by the suction of the piston in the cylinder and also to prevent the carbonization of the lubricant which is supplied to the valve chests.

In practice the throttle control lever in the cab will be moved slightly past the position in which the throttle is closed in es tablishing communication between the boiler and the pipes 50, this being permitted by the usual lost motionw connections between said lever and throttle.

When the locomotive comes to a complete stop the throttle lever may be reversely shifted sufficiently to cut oil the flow oi steam through the pipes 50 without moving the main throttle from its seat.

. A suitable cock connected to an actuating rod 54:, extending to the cab of the locomotive, may be provided in the steam supply pipe 5 so that the engineer may completely out of? the supply of steam to the casing 51 when desired.

The slight movement of the valve in casing- 51 in cutting oil flow of steam to the pipes- 50 when the locomotive has come to rest need not be suilicient to destroy the connection between the conduit 22 and exhaust pipel.

It willbe seen that the invention provides a very simple means which is actuated from the engineer s throttle control lever whereby the superheater flue damper will be maintained in proper relation to said tines according as the circulation of steam through'the superheater tubes is controlled and that when said damper is in closed po-' sition-the cylinder 21 and its actuating means is in constant communication with the atmosphere so that accidental swinging of the damper to open position is impossible.

All of the parts controlling the supply of steam to the cylinder 21 and to the locomotive valve chests while the locomotive is drifting are arranged exteriorly of the locomotive and in a position where they can be readily inspected and repaired it necessary. The two valves being connected-are simultaneously moved whenever the throttle actuating lever is shifted by the engineer.

Having thus described the invention what is claimed is;

1. The combination of a steam locomotive boiler including a front flue sheet, superheater fines opening through said flue sheet,

a perforated baffle in advance of the forward ends of Y the superheater fines, a

damper adapted to closet'he lower end of the space between the frontflue sheet and said battle, a plurality of plates pivotally supported in front of the battle and movable. to and from a position to close the perfora-I tions thereof, means actingto maintain the damper closed and said plates across the pertorations in the baffle, .means for opening the damper and moving said plates to uncover the perforations in the baffle including a pressure cylinder and a conduit for conducting steam thereto from the boiler, a valve controlling flow through said conduit,

and means connecting said valve with the locomotive throttle-,- whereby when the throtthe perforations in the baiile and when the throttle is closed said cylinder will be in communication with an exhaust port.

2. ln a steam locomotive the combination with a boiler including a front flue sheet, and superheater fines, opening through said flue sheets, of a perforated baffle extending across the front ends of said dues, a pivotally mounted damper adapted to close the lower end of the space between said baffle and the front flue sheet, a plurality of shutter plates each hinged at one edge to the front face of the battle, a draft link pivotally connected with all of said plates adjacent their opposite edges, whereby said plates may be simultaneously adjusted to extend forward from the baille or downwardly over the perforations therein, a pressure cylinder, a conduit for supplying steam trom the boiler to said cylinder, a shaft adapted to be rocked when steam is admitted to said ,oyflinder,

and connected to both the damper and said draft link, whereby when steam is admitted to the cylinder the damper will be opened and said plates adjusted to uncover the perforations in the baille, and

means for automatically closing the damper and moving said plates across the perforations in the: baffle when the supply of steam to the cylinder is cut oil,

3. The combination in a steam locomotive provided 'With superheater fines, of a damper for controlling the flow of gases through said fines, means normally holding said damper closed, means for opening said damper including a pressure cylinder and a conduit for supplying steam thereto, a valve controlling flow through said eondui-t, a conduit for supplying steam from the boiler to a steam chest of the'locomotive when the locomotive is drifting, a valve controlling flow through the last said conduit,

means connecting saidva'lves, and a connection between one of said valves and the locomotive throttle actuating devices, whereby both said valves will be positively operated as. the throttle -is closed and opened. 7 v

4. The combination of asteam locomotive boiler including-a front flue sheet, superheater tubes opening through said sheet, a perforated baflle in advance of the forward ends of the superheater tubes, a damper'adapted to close the lower end of the space between the front flue sheet and said battle, a plurality of plates pivotally supported at one edge adjacent the battle, a bar pivotally connected with each of said plates, a rock shaft having an arm connected to said bar, a pressure cylinder, a

shaft adaptedto be rocked in one direction when steam is admitted to said cylinder and provided with two arms, means connecting one of said arms with the damper, means connecting the other of said arms with the actuating rock shaft of said pivotally mounted plates whereby, when steam is sup: plied to the cylinder, the damper will be adjusted to close the lower end of the space between the flue sheet and battle and the pivotally mounted plates turned to close the perforations in the bafiles, means for sup plying steam to the'cylinder, and means for moving the damper and pivoted plates to open position when the supply of steam to the cylinder is cut 05. 5. The combination in a steam looomotiv provided with 'superheater fines, of a damper controlling the flow of gases through said fiues, means acting to hold the damper in closed position, means for opening the damper comprising a pressure cyl index" and a conduit for supplying steam thereto, a valve controlling the flow of steam through said conduit means for supplying steam to the locomotive cylinders when the engine is drifting, including. a valve ar-- ranged adjacent said damper controlling valve, means connecting said valves for effecting simultaneous movement thereof, a a

reciprocating rod for actuating the throttle valve of the locomotive, and connections between sa1d rod and one of saidvalves wherethrough said conduit, means for supplying.

steam to the locomotive cylinders when the engine is" drifting, including a valve arranged adjacent said damper controlling valve, means connecting said valves for effectmg s1multaneous movement thereof,

means for actuating the throttle valve of a locomotive, connections bet-ween said means and the said valves whereby, when the throttle is closed, the valves will be positively actuated to close the damper and supply steam to the locomotive cylinders, and when the throttle is opened the supply of steam to the damper controlling devices will be positivelycut oil, and an independent valve adapted to cut off the supply of steam to the conduit to which steam is supplied to the locomotive cylinders, when the locomotive is drifting. 1

In testimony whereof I have hereunto set my hand.

JosEPH-n. srannaan, SR. 

